25 lines
742 B
Rust
25 lines
742 B
Rust
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//! Helper functions for managing light client key material.
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use zcash_primitives::zip32::{ChildIndex, ExtendedSpendingKey};
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/// Derives the ZIP 32 [`ExtendedSpendingKey`] for a given coin type and account from the
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/// given seed.
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///
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/// # Examples
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///
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/// ```
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/// use zcash_client_backend::{constants::testnet::COIN_TYPE, keys::spending_key};
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///
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/// let extsk = spending_key(&[0; 32][..], COIN_TYPE, 0);
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/// ```
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pub fn spending_key(seed: &[u8], coin_type: u32, account: u32) -> ExtendedSpendingKey {
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ExtendedSpendingKey::from_path(
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&ExtendedSpendingKey::master(&seed),
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&[
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ChildIndex::Hardened(32),
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ChildIndex::Hardened(coin_type),
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ChildIndex::Hardened(account),
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],
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)
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}
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